package org.junit.tests;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;

public class ExpectedTest {
	
	public static class Expected {
		@Test(expected= Exception.class) public void expected() throws Exception {
			throw new Exception();
		}
	}
	
	@Test public void expected() {
		JUnitCore core= new JUnitCore();
		Result result= core.run(Expected.class);
		assertTrue(result.wasSuccessful());
	}
	
	public static class Unexpected {
		@Test(expected= Exception.class) public void expected() throws Exception {
			throw new Error();
		}
	}
	@Test public void unexpected() {
		Result result= JUnitCore.runClasses(Unexpected.class);
		Failure failure= result.getFailures().get(0);
		String message= failure.getMessage();
		assertTrue(message.contains("expected<java.lang.Exception> but was<java.lang.Error>"));
		assertEquals(Error.class, failure.getException().getCause().getClass());
	}
	
	public static class NoneThrown {
		@Test(expected= Exception.class) public void nothing() {
		}
	}
	@Test public void noneThrown() {
		JUnitCore core= new JUnitCore();
		Result result= core.run(NoneThrown.class);
		assertFalse(result.wasSuccessful());
		String message= result.getFailures().get(0).getMessage();
		assertTrue(message.contains("Expected exception: java.lang.Exception"));
	}
	
	public static class ExpectSuperclass {
		@Test(expected= RuntimeException.class) public void throwsSubclass() {
			throw new ClassCastException();
		}
	}
	@Test public void expectsSuperclass() {
		assertTrue(new JUnitCore().run(ExpectSuperclass.class).wasSuccessful());
	}
}
